How do pacemakers and defibrillators work? A cardiologist explains how they interact with the electrical system of the heart

Electrocardiograms, or ECGs, record the electrical activity of your heart. Randy Faris/The Image Bank via Getty Images – By Virginia Singla, Clinical Assistant Professor of Cardiology, University of Pittsburgh Published: 2023 Dec 11 – Your heart’s job is to keep your pulse steady …